Law of the Wasteland

Non-mount creatures with power 3 or less can't
attack unless their controller pays 3 life.
Whenever a creature attacks or blocks, Law of
the Wasteland deals 1 damage to it unless it has
trample, haste, lifelink, first strike, deathtouch,
vigilance, or reach.
{3}{b/r}{b/r}, Sacrifice Law of the Wasteland: Destroy
your choice of all Nonmount Nonrider creatures
or all creatures with power or toughness 3 or less.